Date: Wed, 16 Jul 2014 22:50:37 -0700
From: Kees Cook <kees@...flux.net>
To: oss-security@...ts.openwall.com
Subject: CVE-2014-4943: Linux privilege escalation in ppp over l2tp sockets
CVE-2014-4943 is a flaw in the Linux kernel allowing an unprivileged user
to escalate to kernel privilege when CONFIG_PPPOL2TP is enabled. If built
as a module, a work-around to limit this to just the root user would be
to add this to /etc/modprobe.conf:
alias pppox-proto-1 off
blacklist l2tp_ppp
Upstream commit:
https://git.kernel.org/linus/3cf521f7dc87c031617fd47e4b7aa2593c2f3daf
-Kees
--
Kees Cook @outflux.net